氮浓度对牟氏角毛藻富集2,2',4,4',5-五溴联苯醚的影响  

Effects of nitrogen concentration on bioconcentration of 2,2',4,4',5-pentabromodiphenyl ether by Chaetoceros muelleri

作　　者：葛蔚[1] 柴超[2] 董超[2] 

机构地区：[1]青岛农业大学生命科学学院,山东青岛266109 [2]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《中国环境科学》2012年第10期1882-1887,共6页China Environmental Science

基　　金：国家自然科学基金资助项目(40906061);山东省"两区"建设专项资金项目(2011-黄-19);青岛市公共领域科技支撑计划(12-1-3-64-nsh);青岛农业大学高层次人才启动基金资助项目(630642)

摘　　要：以牟氏角毛藻为研究对象,采用半连续培养法,研究了不同氮浓度条件下牟氏角毛藻对2,2',4,4',5-五溴联苯醚富集.结果表明,牟氏角毛藻对多溴联苯醚的富集与氮营养条件有关,随着氮浓度的增加,富集量和富集因子均呈降低趋势.氮浓度为0,128,512μmol/L条件下,单位藻细胞的富集量分别为2.84,2.38,1.91ng/106cells,单位体积藻液富集量分别为0.19,0.16,0.12ng/mL.富集因子的变化趋势相似,氮为0μmol/L时单位总脂富集因子(BCFlipid)为238.19×104(ng/g)/(ng/mL),随着氮浓度的升高,BCFlipid明显降低.相关性分析表明,单位体积藻液富集量、单位藻细胞富集量和BCFlipid等均与氮浓度呈现显著的负相关关系(r>-0.8,P<0.05),而富集量和富集因子与单位藻细胞和单位体积藻液总脂含量存在显著的正相关关系(r>0.8,P<0.05).The bioconcentration of 2,2＇,4,4＇,5-pentabromodiphenyl ether（BDE-99） by Chaetoceros muelleri in semicontinuous culture under different nitrogen concentrations was studied.The bioconcentration of BDE-99 by Chaetoceros muelleri was related to the nitrogen concentrations.With the increase of nitrogen concentrations,the bioconcentration content and bioconcentration factor declined.When the concentration of nitrogen was 0,128,512 μmol/L,the bioconcentration content per cell was 2.84,2.38,1.91 ng/106 cells,respectively;and the bioconcentration content per algal culture was 0.19,0.16,0.12 ng/mL,respectively.When nitrogen was 0 μmol/L,BCFlipid was 238.19×104（ng/g）/（ng/mL）.Pearson correlation analysis indicated the bioconcentration content per cell,algal culture and BCFlipid exhibited significantly negative correlation with nitrogen concentrations（r-0.8,P0.05）.On the other hand,the bioconcentration content and BCFs presented significantly positive correlation with total lipids（r0.8,P0.05）.

关 键 词：氮 多溴联苯醚 富集 牟氏角毛藻 

分 类 号：X55[环境科学与工程—环境工程]